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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Income Statement [Abstract]        
Net sales $ 3,551 $ 2,157 $ 6,331 $ 4,056
Cost of goods sold 585 358 1,043 718
Gross profit 2,966 1,799 5,288 3,338
Operating expenses        
Research and development 1,155 1,341 2,964 2,275
Selling, general and administrative 6,799 6,278 13,509 12,464
Total operating expenses 7,954 7,619 16,473 14,739
Loss from operations (4,988) (5,820) (11,185) (11,401)
Other (income) expense        
Interest and other income (85) (38) (204) (42)
Other expense 5
Total other (income) expense (85) (38) (204) (37)
Loss before income taxes (4,903) (5,782) (10,981) (11,364)
Benefit from income taxes 445 211 445
Net loss $ (4,903) $ (5,337) $ (10,770) $ (10,919)
Net loss per share of common stock - Basic (in dollars per share) $ (1.03) $ (1.2) $ (2.27) $ (2.25)
Net loss per share of common stock - Diluted (in dollars per share) $ (1.03) $ (1.2) $ (2.27) $ (2.25)
Weighted average common shares outstanding - Basic (in shares) 4,751 4,448 4,747 4,853
Weighted average common shares outstanding - Diluted (in shares) 4,751 4,448 4,747 4,853